Influence of Uncertainty in Hadronic Interaction Models on the Sensitivity Estimation of Cherenkov Telescope Array
Influence of Uncertainty in Hadronic Interaction Models on the Sensitivity Estimation of Cherenkov Telescope Array
复制标题
强子相互作用模型的不确定性对切伦科夫望远镜阵列灵敏度估计的影响
DOI：
10.1088/1742-6596/1468/1/012073
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
T. Yoshikoshi for the CTA Consortium
中科院分区：
文献类型：
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作者：
M. Ohishi;L. Arbeletche;V. de Souza;G. Maier;K. Bernloehr;A. Moralejo;J. Bregeon;L. Arrabito;T. Yoshikoshi for the CTA Consortium
宇宙射线质子和大气中原子核之间的高能（VHE）相互作用仍然没有完全被理解，改进用于模拟的相互作用模型的努力正在进行中，从各种对撞机和空气淋室实验中得到反馈。成像大气切伦科夫望远镜（IACTs）是地面上的间接VHE伽玛射线探测器，宇宙射线质子是这些系统中伽玛射线测量的主要背景。背景质子的抑制能力决定了IACTs的大部分伽马射线灵敏度曲线。对于处于设计阶段的IACT系统，采用模拟质子事件来估计剩余背景能级。我们利用CORSIKA中提供的几种相互作用模型，研究了当前强子相互作用模型的不确定性对切伦科夫望远镜阵列估计伽马射线灵敏度的影响。
Very-high-energy (VHE) interaction between cosmic-ray proton and nuclei in the atmosphere is still not perfectly understood and efforts to improve interaction models used in simulations are ongoing, with feedback from various collider and air shower experiments. Imaging Atmospheric Cherenkov Telescopes (IACTs) are indirect VHE gamma-ray detectors on the ground and cosmic-ray proton is a major background to gamma-ray measurements in these systems. Rejection power of background protons determines most part of the gamma-ray sensitivity curve of IACTs. As for an IACT system in design phase, simulated proton events are used to estimate the residual background level. We investigated the influence of the uncertainty in the current hadronic interaction models on the estimated gamma-ray sensitivity of Cherenkov Telescope Array, using several interaction models available in CORSIKA.